Poor service

My contract has come to an end. I saw that i am still getting billed. When trying to contact the numbers on the statement it leads me to a recommended whatsapp robotics application that does not allow an option to speak to an agent. I called various numbers same whatsapp link was sent. I sms 081 180 and below options appear I could not understand your response. Please respond using the numbers on the menu items listed below.

1. Available Balance 2. Usage Information 3. Voucher Recharge 4. Data Purchase

Why is it so hard to get an agent to call me? This company can easy take our money and make it hard to get ahold of an agent. I am deeply disappointed! I can't go in store as for i am on crustches and 8 months pregnant. What do i do in the interim?